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package com.sun.enterprise.v3.admin;

import javax.management.MBeanServer;
import javax.management.MBeanServerDelegate;
import javax.management.MBeanServerBuilder;

/**
 * AppServer MBSBuilder for PE set as the value for javax.management.initial.builder
 * in the environment. This builder extends from javax.management.MBeanServerBuilder
 * and creates MBS with app server interceptors
 */
public class AppServerMBeanServerBuilder extends javax.management.MBeanServerBuilder {
    private static final MBeanServerBuilder defaultBuilder = new MBeanServerBuilder();
    private static MBeanServer _defaultMBeanServer = null;
    
     public MBeanServer newMBeanServer(String defaultDomain,
                                    MBeanServer outer, 
                                    MBeanServerDelegate delegate) {
         MBeanServer mbeanServer;
         synchronized (AppServerMBeanServerBuilder.class) {
             if ( _defaultMBeanServer == null ) {
                 mbeanServer = newAppServerMBeanServer(defaultDomain, delegate);
                 _defaultMBeanServer = mbeanServer;
             }
             else {
                 mbeanServer = defaultBuilder.newMBeanServer(
                     defaultDomain, outer,  delegate);
             }
         }
         return mbeanServer;
     }
    
     protected MBeanServer newAppServerMBeanServer(String defaultDomain,
                                                MBeanServerDelegate delegate) {
        final DynamicInterceptor result = new DynamicInterceptor();
        final MBeanServer jmxMBS = defaultBuilder.newMBeanServer(
            defaultDomain, result, delegate);
        result.setDelegateMBeanServer( jmxMBS );
               
        return result;
     }
          
    public MBeanServerDelegate newMBeanServerDelegate()  {
        return defaultBuilder.newMBeanServerDelegate();
     }
}
